RU2785335C1 - Vacuum cleaning unit (options) - Google Patents

Abstract

FIELD: vacuum cleaners.

SUBSTANCE: inventions group relates to vacuum cleaners. The cleaning block comprises a columnar body part having a rotation direction hole formed on its outer circumferential surface, a shaft mounted to reciprocate a predetermined distance in its longitudinal direction in a cavity formed in the body part, a drive part that protrudes from the shaft in its radial direction, a brush part which has one side mounted on the outer circumferential surface of the body part in its longitudinal direction and rotates based on one side as a rotation axis, and a driven part which extends from the brush part in the direction to the driving part, passes through the rotation direction hole, and is inserted into the rotation direction groove formed in the driving part. The groove for the direction of rotation extends through a predetermined angle relative to the longitudinal direction of the shaft. When the shaft performs a reciprocating motion, the driven portion is guided to rotate by the rotation direction slot, and the brush is rotated by the rotation of the driven portion.

EFFECT: functionality is expanded, convenience of use is increased due to automatic adjustment of the position of the brush depending on the surface to be cleaned.

17 cl, 16 dwg

Description

The field of technology to which the invention belongs

[0001] The present disclosure relates to a cleaning unit, and more specifically, to a cleaning unit having a rotary brush agitator when the vacuum cleaner is being operated on a carpet.

State of the art

[0002] A vacuum cleaner is a device that performs a vacuum cleaning function by sucking in dust and foreign matter along with air and separating them to collect dust. The vacuum cleaner includes a suction nozzle module, and the suction nozzle module comes into contact with a surface to be cleaned to suck up dust and foreign matter present on the surface along with air. In particular, the vacuum cleaner is mainly operated in a floor environment.

[0003] The suction nozzle module has an agitator to sweep or capture dust and foreign matter from the surface to be cleaned. The brush or rubber plate protrudes from the outer peripheral surface of the cylindrical body of the agitator, and when the agitator rotates, the brush or rubber plate rotates with it to sweep or pick up dust and foreign matter from the floor. Driven or entrapped dust and foreign matter is sucked through the suction nozzle module for separation and collection.

[0004] However, when the floor environment is a carpet environment, since the suction nozzle unit is at a distance from the carpet surface, the agitator brush or rubber plate does not reach the carpet surface, thereby lowering the cleaning performance.

[0005] In order to solve the problem, it is necessary to extend the length of the stirrer brush or rubber plate.

[0006] For example, Japanese Patent Publication No. CN 207666529 U (published July 31, 2018) discloses a stirrer adapted to change the length of the brush in a staggered manner, in which a plurality of slots having different heights are placed on the stirrer body to allow the brush to be separated from and gather in many grooves.

[0007] However, for this purpose, the user must separate the brush from the existing groove and collect it in another groove whenever the floor environment changes, there is a hygiene problem in that the user must touch the dust accumulated on the agitator with his hand. , loss of time occurs due to replacement, and there is also a problem that it cannot be applied to an automatic cleaning device such as a robot vacuum cleaner.

[0008] In consideration of the user's hygiene and convenience, a vacuum cleaner having a structure adapted to easily modify the length of a brush or agitator rubber plate according to a change in floor environment has been proposed.

[0009] In addition, in view of the applicability to an automatically controlled device such as a robot vacuum cleaner, a vacuum cleaner having a structure adapted to recognize a change in the floor environment to modify the length of the brush or the agitator rubber plate without user manipulation should be proposed.

The essence of the invention

Technical task

[0010] An aspect of the present disclosure is to provide a cleaning unit adapted to change the radius of rotation of the brush in response to changing floor environments. In particular, an aspect of the present disclosure is to provide a cleaning block having a structure adapted to easily change the rotation radius of the brush without touching the dust with a hand in the process of changing the rotation radius of the brush. In particular, it is an aspect of the present disclosure to provide a cleaning unit having a structure adapted to automatically change the radius of rotation of the brush in response to floor environments.

[0011] An aspect of the present disclosure is to provide a cleaning block having a structure in which the brush can rotate on the outer peripheral surface of the body portion when a shaft inserted into the agitator body member cavity in the longitudinal direction of the body member moves horizontally.

[0012] An aspect of the present disclosure is to provide a cleaning block having a design adapted to apply appropriate pressure when the brush presses against a surface to be cleaned.

[0013] An aspect of the present disclosure is to provide a cleaning block having a structure adapted to push or pull on one side of the shaft to allow the agitator shaft to move horizontally as the agitator rotates.

Solution

[0014] In order to achieve the objectives of the present disclosure, the present disclosure provides a cleaning unit including: a columnar body portion accommodating a rotation direction hole on its outer peripheral surface; a shaft provided to reciprocate a predetermined distance in a longitudinal direction in a cavity provided in the body portion; a drive portion protruding from the shaft in the radial direction; a brush portion having one side provided on the outer circumferential surface of the body portion in the longitudinal direction to rotate with one side as its rotation axis; and a driven portion extending from the brush portion towards the driving portion to be inserted into the rotation direction slot provided in the drive portion through the rotation direction hole, the rotation direction slot being extended at a predetermined angle with respect to the shaft longitudinal direction, and when Here, when the shaft performs a reciprocating motion, the driven portion is driven into rotation by the rotation direction slot, and the brush portion is rotated by the rotation of the driven portion.

[0015] In addition, the brush portion and the driven portion extending from the brush portion may be plurally disposed in the body portion in the circumferential direction, and the rotation direction groove may be plurally disposed in the driving portion in the circumferential direction.

[0016] In addition, the driving portion may be placed in a plurality in the longitudinal direction on the shaft, and the driven portion may be placed in a plurality of portions in the longitudinal direction of the brush portion.

[0017] In addition, the distance between the shaft and the other end of the brush portion may become minimum when the shaft moves towards the first side of the body part as much as possible, and becomes maximum when the shaft moves towards the other side opposite the first side as much as possible.

[0018] In addition, the cleaning section may further include a fixed brush section extending radially outward from the outer peripheral surface of the body portion, the distance between the shaft and the other end of the brush section may be spaced apart by a first turning radius, which is a minimum value when the shaft moves as much as possible towards the first side of the body part, and can be spaced apart by the second turning radius, which is the maximum value when the shaft moves as much as possible towards the other side opposite the first side, and the distance between the shaft and the extreme section from the radially outer side of the fixed brush section may be greater than the first radius of rotation and may be less than the second radius of rotation.

[0019] In addition, the brush section may include a first brush and a second brush, respectively, extending from one side of the brush section to the radially outer side of the body portion, the first brush and the second brush forming a predetermined angle with each other, and lengths in the extension direction in which the first brush and the second brush are placed must be different from each other.

[0020] In addition, the body portion may include a hollow body member disposed with a recessed groove, in which a brush portion is provided on its outer peripheral surface, both ends of which are open; and a first end cap and a second end cap, respectively, mounted on both ends of the body member to cover both ends, respectively.

[0021] In addition, one side of the brush section may be placed in a recessed groove, rotating protrusions may be placed on both ends of the first side of the brush section in the longitudinal direction, and the first end cap and the second end cap may be provided with receiving holes connected to rotation with rotating ledges.

[0022] Further, the shaft may include a power transmission spike extending through one side of the shaft, and the first end cap may include a shaft guiding portion slidably attached to one side of the shaft.

[0023] In addition, a shaft guiding hole slidably connected to the shaft may be placed in the second end cap, and the shaft may include an E-ring protruding in the radial direction, and the E-ring may be placed plural with a second end cap inserted between them to limit the reciprocating distance of the shaft.

[0024] In addition, the cleaning block may further include a shaft receiving portion mounted on the other side of the shaft, wherein a bearing is inserted between the shaft receiving portion and the shaft, and an E-ring pluralized with the shaft receiving portion between them to secure the shaft receiving portion in the longitudinal direction.

[0025] In addition, the cleaning unit may further include a first power module attached to the first end cap to rotate the shaft; a second power module connected to the shaft receiving portion to push and pull the shaft receiving portion according to the operating information; a sensor connected to the first power module and configured to detect a current value of the first power module; and a controller that calculates the operation information that is electrically connected to the second power module to transmit the calculated operation information to the second power module, and electrically connected to the sensor to receive the current value of the first power module that is detected in the sensor, wherein the controller calculates the operation information. using the detected current value of the first power module.

[0026] In addition, the operating information may include the first operating information and the second operating information, wherein the second power module receives the first operating information to push the section to receive the shaft with a predetermined pressure, and receives the second operating information to pull the section to receive the predetermined pressure shaft, and the controller calculates first operation information when the detected current value of the first power module is greater than or equal to the first value, and calculates second operation information when the detected current value of the first power module is less than the first value.

[0027] In addition, in order to achieve the objectives of the present disclosure, the present disclosure provides a cleaning block including a columnar body portion in which a rotation direction hole is provided on its outer peripheral surface; a shaft provided for reciprocating a predetermined distance in the longitudinal direction in the cavity placed in said housing; a drive portion protruding from the shaft in the radial direction and having an outer peripheral surface inclined radially outward in the longitudinal direction; a brush portion having a first side provided on the outer circumferential surface of the body portion in the longitudinal direction to rotate with the first side as its rotation axis; and a driven portion extending from the brush portion to the body portion through the rotation direction hole, the driven portion having an inclined portion in contact with the outer peripheral surface, and when the shaft reciprocates, the driven portion is rotated by the outer peripheral surface, and the brush the section is rotated by rotating the driven section.

[0028] Further, the brush portion and the driven portion extending from the brush portion may be arranged plurally in the circumferential direction of the body portion.

[0029] In addition, the driving portion may be placed in a plurality in the longitudinal direction on the shaft, and the driven portion may be placed in a plurality of portions in the longitudinal direction of the brush portion.

[0030] In addition, the distance between the shaft and the other end of the brush portion may become minimum when the shaft moves towards the first side of the body part as much as possible, and becomes maximum when the shaft moves towards the other side opposite the first side as much as possible.

Useful results of the invention

[0031] According to the present disclosure, the following results can be obtained.

[0032] First, in the present disclosure, a cam structure that converts the longitudinal motion of the shaft into rotational motion of the brush portion can be used, thereby changing the rotation radius of the brush portion according to the floor environment. By this, even when the cleaner is at a distance from the surface, such as in a carpet environment, the rotation radius of the brush can be extended to press on the surface. That is, the cleaning performance of the vacuum cleaner can be maintained in various floor environments.

[0033] In addition, the user can easily change the rotation radius of the brush without touching the dust with his hand in the process of changing the rotation radius of the brush. Through this, the user can clean various floor environments while maintaining cleanliness.

[0034] In addition, a bearing may be provided between the shaft receiving portion and the shaft, thereby pushing or pulling the shaft while the agitator rotates. By means of this, the radius of rotation of the brush portion can be expanded or reduced.

[0035] In addition, the fixed brush portion can be placed between the rotating brush portions, thereby always applying pressure with proper pressure to the surface to be cleaned.

[0036] In addition, the brush portion may include a first brush and a second brush inclined at a predetermined angle to each other, wherein the first brush and the second brush are placed to have different lengths, thereby always applying pressure with proper pressure. to the surface to be cleaned.

[0037] In addition, the rotation radius of the brush portion is automatically adjusted to expand according to the value of the current flowing through the first power module that rotates the stirrer. Through this, when the vacuum cleaner is automatically controlled, the rotation radius of the brush portion can be adjusted to expand in the environment of the carpet.

Brief description of the drawings

[0038] FIG. 1 is a perspective view illustrating a prior art robot cleaner.

[0039] FIG. 2 is a side view of the robot cleaner illustrated in FIG. one.

[0040] FIG. 3 is a perspective view illustrating an agitator according to an embodiment of the present disclosure.

[0041] FIG. 4 is an exploded view of the agitator illustrated in FIG. 3.

[0042] FIG. 5A is a perspective view of the shaft illustrated in FIG. four.

[0043] FIG. 5B is a perspective view illustrating a state in which the stud and the E-ring are attached to the shaft illustrated in FIG. 5A.

[0044] FIG. 5C is a perspective view illustrating a state in which the driving portion is attached to the shaft illustrated in FIG. 5b.

[0045] FIG. 6 is a perspective view illustrating the second end cap illustrated in FIG. four.

[0046] FIG. 7 is a perspective view illustrating the body member illustrated in FIG. four.

[0047] FIG. 8 is a perspective view illustrating the brush holder illustrated in FIG. four.

[0048] FIG. 9 is a perspective view illustrating the shaft receiving portion illustrated in FIG. four.

[0049] FIG. 10A is a perspective view illustrating a state before the agitator brush portion illustrated in FIG. 3 is expanding.

[0050] FIG. 10B is a perspective view illustrating a state in which the agitator brush portion illustrated in FIG. 3 is expanding.

[0051] FIG. 10C is a side view illustrating the operation state of the agitator brush portion illustrated in FIG. 3.

[0052] FIG. 11 is a side view illustrating a modified example of the agitator illustrated in FIG. 3.

[0053] FIG. 12 is a side view illustrating another modified example of the agitator illustrated in FIG. 3.

[0054] FIG. 13A is a partial perspective view illustrating yet another modified example of the agitator illustrated in FIG. 3.

[0055] FIG. 13B is a partial perspective view illustrating a state in which the brush portion of the agitator illustrated in FIG. 13A is expanding.

[0056] FIG. 13C is a side view illustrating the operating state of another modified example of the agitator illustrated in FIG. 3.

[0057] FIG. 14 is a block diagram illustrating a configuration for controlling a cleaning unit according to the present disclosure.

[0058] FIG. 15 is a flowchart illustrating the flow of the cleaning block control method according to the present disclosure.

[0059] FIG. 16 is a flowchart illustrating an embodiment of step S20 in FIG. fifteen.

Mode of carrying out the invention

[0060] First, before describing the agitator according to the present disclosure, a prior art vacuum cleaner to which the agitator can be attached will be described.

[0061] FIG. 1 is a perspective view illustrating an example of a prior art vacuum cleaner, and FIG. 2 is a side view of the vacuum cleaner illustrated in FIG. one.

[0062] The robot cleaner 100 can be configured to perform a floor polishing function as well as a floor dust suction function. To this end, the robot cleaner 100 includes a cleaner body 110 and a suction nozzle unit 120.

[0063] The cleaner body 110 and the suction nozzle unit 120 define the appearance of the robot cleaner 100. Various parts, including a controller (not shown) for controlling the robot cleaner 100, are incorporated or installed in the robot cleaner 100. In addition, various parts for cleaning the area to be cleaned are installed in the module 120 of the suction nozzle.

[0064] The appearance of the body 110 of the vacuum cleaner is determined by the outer cover 111 and the base body 112 of the base.

[0065] The outer cover 111 and the base body 112 are attached to each other to define the appearance of the main body 110 of the cleaner. The base body 112 defines the lower portion of the cleaner body 110 and is configured to house the components of the robot cleaner 100. In addition, the outer cover 111 is attached to the upper portion of the base body 112.

[0066] The cleaner body 110 is provided with wheels 160, 160' for driving the robot cleaner 100. The wheels 160, 160' may be provided in the lower portion of the cleaner body 110 or the suction nozzle module 120. The robot cleaner 100 can move or rotate back and forth, left and right through the wheels 160, 160'.

[0067] For example, when the robot cleaner 100 has a self-driving function, the wheels 160, 160' may be configured as a wheel module 160 that rotates while receiving a driving force from a driving motor. As another example, when the cleaner body 110 is moved by user manipulation, the wheels 160, 160' may be configured to only have a rolling function relative to a typical floor.

[0068] The auxiliary wheel 160' may be further provided in the body 110 of the vacuum cleaner. The auxiliary wheel 160' supports the cleaner body 110 along with the wheel module 160 and can be configured to allow passive rotation. The auxiliary wheel 160' is configured to support driving the robot cleaner 100 via the wheel module 160.

[0069] The dust container 170 is installed at the rear of the cleaner body 110 . The cleaner body 110 may have a partially recessed shape to accommodate the dust container 170 while maintaining a round appearance. The dust container 170 may include at least one of a filter and a cyclone for filtering dust and foreign matter in the intake air.

[0070] The robot cleaner 100 may include a dust container cover 171 covering the dust container 170 . In a state in which the dust container cover 171 is placed to cover the top surface of the dust container 170, the dust container cover 171 may delimit the dust container. Accordingly, the dust container cover 171 can prevent the dust container 170 from being arbitrarily separated from the cleaner body 110 .

[0071] FIG. 2 illustrates that the dust container cover 171 is pivotally attached to the vacuum cleaner body 110 in a pivoting manner. The dust container lid 171 may be attached to the dust container 170 or the vacuum cleaner body 110 to keep the top surface of the dust container 170 closed.

[0072] When the robot cleaner 100 has a self-driving function similar to the robot cleaner, a detection unit 118 for detecting the environment may be provided in the cleaner body 110 . A controller configured with a main printed circuit board (not shown) may detect an obstacle, detect a landmark, or electronically generate a map of a moving area via the detection unit 118.

[0073] The suction nozzle module 120 is attached to the front side of the cleaner body 110 in a protruding form. The appearance of the suction nozzle module 120 is determined by the module installation case 121, and the agitator installation portion 121a is placed on the inside of the module installation case 121. The agitator 200 is detachably mounted on the agitator installation portion 121a.

[0074] A bumper switch 122 that detects a physical collision may be provided on the outside of the suction nozzle module 120.

[0075] This drawing shows that the bumper switch 122 is provided in the module 120 of the suction nozzle. The bumper switch 122 may be placed on the front side of the suction nozzle module 120, and in some cases, may be placed on both sides, as well as on its front side, as illustrated.

[0076] As illustrated, when the suction nozzle module 120 is placed in a mold protruding from the cleaner body 110, the above-described auxiliary wheel 160' for stably driving the robot cleaner 100 may also be provided on the underside of the suction nozzle module 120.

[0077] The agitator 200 removably mounted to the agitator installation portion 121a is configured to clean the area to be cleaned. Dust and foreign matter in the air sucked in through the agitator 200 is separated from the air by a filter or cyclone provided in the vacuum cleaner body or dust container, and collected in the dust container 170 . In addition, air separated from dust and foreign matter is discharged to the outside from the cleaner body 110 . An inlet (not shown) that directs the airflow from the agitator mounting portion 121a to the dust container 170 may be placed inside the vacuum cleaner body 110 . In addition, an outlet port (not shown) that directs the air flow from the dust container 170 to the outside of the cleaner body 110 can be placed inside the cleaner body 110 .

[0078] The vacuum cleaner illustrated in FIG. 1 and 2 illustrates the position in which the agitator 200, 300 according to the present disclosure is provided, and briefly describes the prior art vacuum cleaner in which the agitator 200, 300 is attached to it for operation. The agitator 200, 300 according to the present disclosure can be applied not only to an automatically controlled robot cleaner, but also to a cleaner that is directly manipulated by a user.

[0079] Hereinafter, a cleaning block having an agitator adapted to change the length of a brush according to the present disclosure will be described.

[0080] In the following description, the description of certain components will be omitted in order to clarify the distinctive features of the present disclosure.

[0081] FIG. 3 is a perspective view illustrating an embodiment of an agitator according to an embodiment of the present disclosure.

[0082] Before describing the configuration of the stirrer 200 according to the present disclosure, the directions used below will be defined.

[0083] The term "longitudinal direction", as used below, denotes the axial direction of the shaft 220 (see Fig. 4), which will be described later. That is, "longitudinal direction" means the direction from the first end cap 250 to the second end cap 260 and the direction from the second end cap 260 to the first end cap 250.

[0084] In addition, the term "radial direction", as used below, means the direction with the shortest distance from any one point on the central axis along which the shaft 220 extends (see Fig. 4), to any one point on the outer peripheral surface of the body element 210 placed on a plane perpendicular to the central axis, which will be described later.

[0085] In addition, the term "circular direction" used below denotes the direction of rotation when an imaginary line perpendicular to the central axis of the shaft 220 (see Fig. 4), which is to be described later, rotates along the central axis.

[0086] In addition, the term "front (F)" used below denotes the direction in which the shaft 220 (see Fig. 4) moves when the brush portion 230 expands. That is, it indicates the direction in which the shaft 220 approaches the first end cap 250.

[0087] In addition, the term "rear (R)", used below, denotes the direction in which the shaft 220 (see Fig. 4) moves when the brush section 230 returns. That is, it indicates the direction in which the shaft 220 moves away from the first end cap 250.

[0088] Referring to FIG. 3, the agitator 200 of the present disclosure includes a body portion 205, a shaft 220 (see FIG. 4), a brush portion 230, and a shaft receiving portion 270.

[0089] The body portion 205 includes a body member 210, a first end cap 250, and a second end cap 260.

[0090] The body element 210 may be defined in a hollow form with both open sides. The shaft 220 (see Fig. 4), which is to be described later, is inserted into the cavity of the housing element 210 in the longitudinal direction. The first end cap 250 and the second end cap 260 are respectively inserted and attached to both open ends of the body member.

[0091] Both sides of the shaft 220 (see FIG. 4) are slidably attached to the first end cap 250 and the second end cap 260 in the longitudinal direction. Through this, the shaft 220 (see Fig. 4) can perform reciprocating movements in the longitudinal direction in the body portion 205. In this regard, this will be described in detail later.

[0092] In other words, the first end cap 250 accommodates the front side of the shaft 220 (see FIG. 4). In addition, at the same time, the first end cap 250 is installed on the end portion of the front side of the body member 210 to cover the shaft.

[0093] The second end cap 260 accommodates the rear side of the shaft 220. Also, at the same time, the second end cap 260 is mounted on the end portion of the rear side of the body member 210 to cover the shaft.

[0094] The other side of the shaft 220 is attached to the shaft receiving portion 270 through the second end cap 260.

[0095] The recessed groove 211 is recessed by a predetermined length in the longitudinal direction on the outer peripheral surface of the body member 210. The brush portion 230 is provided in the recessed groove 211 in the longitudinal direction.

[0096] The brush portion 230 rotates with one of its sides placed in the recessed groove 211 as the axis of rotation. In this regard, it will be described in detail later.

[0097] The rotatable lugs 2322 protrude from both end portions of one side housed in the recessed slot 211. The receiving holes 251a, 261a rotatably connected to the rotatable horn 2322 are located in the first end cap 250 and the second end cap 260, respectively.

[0098] The brush portion 230 is connected to the body member 210 via the connection structure described above. In addition, the brush portion 230 can be rotated by the above-described connecting structure.

[0099] FIG. 4 is an exploded view of the agitator illustrated in FIG. 3.

[0100] With reference to FIG. 4, the body member 210, the shaft 220, the brush portion 230, the power transmission unit 240, the first end cap 250 and the second end cap 260, and the shaft receiving portion 270 according to an embodiment of the present disclosure will be described.

[0101] First, the housing element 210 according to the present disclosure will be described.

[0102] The body element 210 is placed in a hollow mold with both ends open. One side of the brush portion 230 may be provided on the outer peripheral surface of the body member 210 in the longitudinal direction.

[0103] The recessed groove 211 may be placed on the outer peripheral surface of the body member 210 in the longitudinal direction.

[0104] The recessed slot 211 may be positioned recessed in the longitudinal direction from the outer peripheral surface of the body member 210. The portion provided with one side of the brush portion 230 is positioned recessed in the portion provided with the brush portion 230.

[0105] The recessed groove 211 provides a space in which one side of the brush portion 230 can rotate.

[0106] A plurality of recessed slots 211 may be placed in the circumferential direction. For example, in the case where three brush portions 230 are placed, three recessed slots 211 are also placed to receive the brush portions 230, respectively.

[0107] The hole 213 for the direction of rotation is placed in the recessed slot 211.

[0108] The connection relationship with other components of the body element 210 is as follows.

[0109] The shaft 220 is inserted into the cavity of the housing element 210 in the longitudinal direction. Then, a brush portion 230 is provided in a recessed slot 211 of the body member 210. In addition, the first end cap 250 and the second end cap 260 are respectively mounted and inserted into both open ends of the body member 210.

[0110] Next, the shaft 220 according to the present disclosure will be described.

[0111] the Shaft 220 is placed in the cavity of the housing element 210 in the longitudinal direction. Both sides of the shaft 220 are slidably attached to the first and second end caps 250, 260, respectively, in the longitudinal direction. Through this, the shaft 220 can perform reciprocating movements in the longitudinal direction in the housing element 210.

[0112] The drive portion 223 extends in the radial direction on the outer peripheral surface of the shaft 220. The drive portion 223 is attached to the outer peripheral surface of the shaft 220. In addition, the shaft 220 and the drive portion 223 may be combined into a single housing.

[0113] Leading section 223 may be defined in a polygonal columnar form. The groove 2233 for the direction of rotation is located on the radially outer side of the drive section 223. The groove 2233 for the direction of rotation extends at a predetermined angle relative to the longitudinal direction of the shaft 220.

[0114] The driven portion 2323, which is to be described later, is inserted into the groove 2233 for the direction of rotation. When the shaft 220 reciprocates in the longitudinal direction along with the driving portion 223, the driven portion 2323 is guided into the rotation direction slot 2233. Through this, the driven portion 2323 is rotated with one side of the brush portion 230 as the axis of rotation. In this regard, it will be described in detail later.

[0115] The groove 2233 for the direction of rotation may be placed in plural on the radially outer side of the drive portion 223 in the circumferential direction. The driven portion 2323 inserted into the rotation direction slot 2233 may also be placed in plural in the circumferential direction of the shaft 220. That is, the brush portion 230 may be plural in the circumferential direction.

[0116] In addition, the driving portion 223 may be plurally placed in the longitudinal direction of the shaft 220. The driven portion 2323 inserted into the rotation direction slot 2233 may also be plurally placed in the longitudinal direction of the shaft 220. That is, , the driven portion 2323 may be pluralized on the brush portion 230 in the longitudinal direction.

[0117] The front end portion of the shaft 220 is slidably attached to the first end cap 250. The rear side of the shaft 220 is attached to the second end cap 260 through passing through. That is, the shaft 220 passes through the second end cap 260 and extends to its rear side and is slidably inserted into the hole 261b to receive the shaft of the second end cap 260.

[0118] The extreme section of the rear side of the shaft 220 is attached to the section 270 to receive the shaft.

[0119] In this drawing, while shaft 220 is illustrated in cylindrical form, shaft 220 may also be defined in polygonal columnar form.

[0120] Here, the polygonal columnar shape does not necessarily include only a shape formed from a straight line, but a shape combined with a straight line and a curve, and may include all other shapes other than a cylindrical shape.

[0121] However, in order to effectively rotate the shaft 220, the axis of rotation and the center of mass of the shaft 220 are preferably determined to coincide with each other.

[0122] In addition, the shaft 220 may include a plurality of studs 2202 and an E-ring 2205. The stud 2202 extends through the shaft 220 in a direction crossing the longitudinal direction of the shaft 220. The E-ring 2205 is configured with an annular yoke portion that is partially open, and a serrated portion extending radially inward from the collar portion.

[0123] A thin groove recessed in the circumferential direction is formed in the shaft 220. In the groove, the E-ring 2205 is inserted into the groove through its open portion.

[0124] The stud 2202 and the E-ring 2205 limit the reciprocating distance of the shaft 220. In addition, the stud 2202 and the E-ring 2205 fix the driving portion 223 and the shaft receiving portion 270 attached to the shaft 220 in the longitudinal direction. In this regard, it will be described in detail later.

[0125] Next, the brush portion 230 according to an embodiment of the present disclosure will be described.

[0126] The brush portion 230 is provided on the outer peripheral surface of the body member 210 in the longitudinal direction. The recessed groove 211 of the body member 210 provided with the brush portion 230 is placed recessed from the outer peripheral surface.

[0127] The brush portion 230 includes a brush holder 232 and a brush 231 inserted into the brush holder 232. In an embodiment of the present disclosure, the brush 231 and the brush holder 232 may be arranged to have the same length in the longitudinal direction. Moreover, the brush holder 232 may be arranged to be substantially the same length as the body member 210 in the longitudinal direction.

[0128] The brush 231 extends in the longitudinal direction. The brush 231 may be in the form of a bundle of multiple brushes or in the form of a rubber plate. The brush 231 strikes the surface to be cleaned while rotating along with the shaft 220 as a rotation axis. Through this, it may be possible to drive or capture dust or foreign matter placed on the surface to be cleaned.

[0129] The brush holder 232 is extended in the longitudinal direction. The groove into which the brush 231 is inserted is placed on one side of the brush holder 232, and the driving portion 2323 is placed on the other side opposite the first side.

[0130] The reducible portion 2323 extends towards the leading portion 223. The outermost portion of the reducible portion 2323 is inserted into the leading portion 223. The outermost portion may be defined in a spherical shape. However, it is not necessarily limited to a spherical shape and can be of any shape that can be inserted into and engaged with the rotation direction slot 2233 of the driving portion 223.

[0131] The rotating protrusions 2322 are extended on both end portions of the brush holder 232 in the longitudinal direction. The rotary projection receiving holes 251a, 261a are provided on the first end plate 251 and the second end plate 261. The rotary projection 2322 is rotatably connected to the rotary projection receiving holes 251a, 261a.

[0132] The brush portion 230 is attached to the body member 210 via a connecting structure. The brush portion 230 rotates with one side provided with holes 251a, 261a to receive the rotating protrusion as the rotation axis.

[0133] In other words, the brush holder 232 rotates about an axis passing through the rotating projections 2322 placed on both of its extreme portions. The brush 231 is inserted into one side of the brush holder 232, and the brush 231 rotates about an axis passing through the rotating protrusion 2322. In addition, the driven portion 2323 located on the other side of the brush holder 232 also rotates about an axis passing through the rotating protrusion 2322.

[0134] That is, the brush 231 and the driven portion 2323 rotate about an axis passing through the rotating protrusion 2322.

[0135] When the shaft 220 reciprocates, the driven portion 2323 is rotated by the rotation direction slot 2233, and the brush 231 rotates by the rotation of the driven portion 2323. This will be described in detail later.

[0136] [0137] Next, the first end cap 250 according to an embodiment of the present disclosure will be described.

[0138] The first end cap 250 includes a first end plate 251. The first end plate 251 is defined in the form of a circular plate. The power transmission portion 252 protrudes from the front side of the first end plate 251, and the first mounting portion 253 is placed on its rear side.

[0139] The first mounting portion 253 is positioned in the circumferential direction to engage with the inner peripheral surface of the body member 210. In addition, the first connecting portion 254, having an elastic force, protrudes from the rear side of the first end plate 251.

[0140] When the first end cap 250 is inserted into the body member 210, the end portion of the first connecting protrusion 254 is caught in the end cap connecting hole 215 located on the outer peripheral surface of the body member 210. Through this, the first end cap 250 is attached to one end portion of the body member. element 210 to cover body element 210.

[0141] The power transmission portion 252 is connected to the first power module. The rotational force of the first power module is transmitted to the stirrer 200 through the section 252 of the power transmission.

[0142] Next, the second end cap 260 according to an embodiment of the present disclosure will be described.

[0143] The second end cap 260 includes a second end plate 261. The second end plate 261 is defined in the form of a circular plate. The second mounting portion 263 is placed on the front side of the second end plate 261.

[0144] The second mounting portion 263 is positioned in the circumferential direction to engage with the inner peripheral surface of the body member 210. In addition, the second connecting protrusion 264, having an elastic force, protrudes from the front side of the second end plate 261.

[0145] When the second end cap 260 is inserted into the body member 210, the end portion of the second connecting protrusion 264 is caught in the end cap connection hole 215 located on the outer peripheral surface of the body member 210. By this, the second end cap 260 is attached to the rear end portion of the body member 210 to cover body member 210.

[0146] The hole 261b for receiving the shaft is located in the center of the second end plate 261, passing through it. The rear side of the shaft 220 is slidably attached to the shaft receiving hole 261b. That is, the shaft receiving hole 261b guides the longitudinal movement of the shaft 220.

[0147] Next, a shaft receiving portion 270 according to an embodiment of the present disclosure will be described.

[0148] The shaft receiving portion 270 is attached to the rear end portion of the shaft 220.

[0149] A bearing receiving portion 270b recessed a predetermined length from the front side toward the rear side is provided in the shaft receiving portion 270. In addition, the hole 270a for connecting the shaft is located on the rear side of the section 270b for receiving the bearing, passing through it.

[0150] The rear end portion of the shaft 220 is rotatably attached to the shaft attachment hole 270a. In addition, the rear end portion of the shaft 220 is provided in the bearing receiving portion 270b. Here, the bearing 271 is inserted between the rear end portion of the shaft 220 and the bearing receiving portion 270b. In an embodiment of the present disclosure, a ball bearing or the like is may be used for bearing 271. As shaft 220 rotates with bearing inner race 271, shaft 220 rotates in shaft receiving portion 270.

[0151] The shaft receiving portion 270 is positioned between a plurality of E-rings 2205 protruding from the outer circumferential surface of the shaft 220. By this, the shaft receiving portion 270 is longitudinally secured to the shaft 220.

[0152] The rear side of the shaft receiving portion 270 is attached to the second power module. The second power module pushes the shaft receiving portion 270 to the front side or pulls the shaft receiving portion 270 to the rear side. That is, the reciprocating movement of the shaft 220 is controlled.

[0153] Hereinafter, with reference to FIG. 5A, 5B and 5C, the shaft 220 according to an embodiment of the present disclosure will be described in detail.

[0154] FIG. 5A is a perspective view of the shaft illustrated in FIG. four.

[0155] Shaft 220 is defined in a long cylindrical shape. In addition, a tenon receiving hole 2201 and an E-ring receiving groove 2204 are provided on the shaft 220.

[0156] The stud receiving hole 2201 extends through the shaft 220 in a direction intersecting the longitudinal direction of the shaft 220. The stud receiving hole 2201 may be pluralized in the longitudinal direction. In the embodiment of the present disclosure, the first stud receiving hole 2201a, the second stud receiving hole 2201b, and the third stud receiving hole 2201c are sequentially arranged in the longitudinal direction.

[0157] The E-ring receiving slot 2204 is recessed in the circumferential direction on the outer circumferential surface of the shaft 220. The E-ring receiving slot 2204 may be pluralized in the longitudinal direction. In an embodiment of the present disclosure, the first slot 2204a for receiving an E-ring, the second slot 2204b for receiving an E-ring, the third slot 2204c for receiving an E-ring, the fourth slot 2204d for receiving an E-ring, the fifth slot 2204e for receiving The E-ring and the sixth E-ring receiving slot 2204f are sequentially arranged in the longitudinal direction.

[0158] FIG. 5B is a perspective view illustrating a state in which the stud and the E-ring are attached to the shaft illustrated in FIG. 5A.

[0159] The first stud 2202a, the second stud 2202b, and the third stud 2202c are sequentially inserted into the first stud receiving hole 2201a, the second stud receiving hole 2201b, and the third stud receiving hole 2201c. In the attached state, both end portions of each stud 2202 protrude from both end portions of the receiving opening 2201.

[0160] The first E-ring 2205a, the second E-ring 2205b, the third E-ring 2205c, the fourth E-ring 2205d, the fifth E-ring 2205e, and the sixth E-ring 2205f are attached to the first slot 2204a for receiving an E-ring, a second slot 2204b for receiving an E-ring, a third slot 2204c for receiving an E-ring, a fourth slot 2204d for receiving an E-ring, a fifth slot 2204e for receiving an E-ring, and a sixth slot 2204f for receiving an E-ring, respectively.

[0161] The E-ring 2205 is configured with an annular collar portion that is partially open and a serrated portion extending radially inward from the collar portion.

[0162] The E-ring 2205 is inserted into the E-ring receiving slot 2204 through a portion that is partially open.

[0163] FIG. 5C is a perspective view illustrating a state in which the driving portion is attached to the shaft illustrated in FIG. 5b.

[0164] Leading portion 223 may be formed in a polygonal columnar shape. The rotation direction groove 2233 is located on the radially outer side of the driving portion 223. The rotation direction groove 2233 is extended while being inclined at a predetermined angle from the longitudinal direction of the shaft 220.

[0165] A through hole is placed at the center of the drive portion 223 to accommodate the shaft 220. In addition, a stud attachment hole 2231 engaged with the stud 2202 is placed recessed on the front side of the drive portion 223.

[0166] Hereinafter, a connection method between the driving portion 223 and the shaft will be described.

[0167] The drive portion 223 may be placed in the plural in the longitudinal direction of the shaft 220. In an embodiment of the present disclosure, two drive portions 223 are attached to the shaft 220.

[0168] The attachment position of the drive portion 223 is determined from the positions of the stud 2202 and the E-ring 2205.

[0169] First, the driving portion 223 is inserted from the rear side of the shaft 220 into its front side through the through hole. When the driving portion 223 is inserted into the position where the second stud 2202b is placed, the second stud 2202b is inserted into the stud attachment hole 2231. Then, from the rear side of the drive portion 223, the first E-ring 2205a is inserted into the first E-ring receiving slot 2204a.

[0170] The driving portion 223 is pushed from the front side to the rear side by the second pin 2202b and is pushed to the front side by the first E-ring 2205a from the rear side. Through this, the leading section 223 is fixed in the longitudinal direction. In addition, since the stud attachment hole 2231 of the driving portion 223 engages with the second stud 2202b, the rotational force of the shaft 220 is transmitted to the driving portion 223. Through this, the shaft 220 and the driving portion 223 rotate together.

[0171] The drive portion 223 is also positioned between the third pin 2202c and the second E-ring 2205b, and the drive portion 223 is attached to the shaft 220 in the same manner as described above.

[0172] The driving portion 223 may be combined into the shaft 220 and is not limited to the above connection method.

[0173] The first spike 2202a inserted into the front side of the shaft 220 engages with the shaft guiding portion 255 of the first end cap 250 to be described later. As the body member 210 rotates through the first power transmission portion, the first pin 2202a rotates together with the shaft guiding portion 255 of the first end cap 250. By doing so, the first pin 2202a transmits the rotational force of the body member 210 to the shaft 220.

[0174] The third E-ring 2205c and the fourth E-ring 2205d are positioned with the second end cap 260 inserted between them. Specifically, the third E-ring 2205c and the fourth E-ring 2205d are positioned with the second end plate 261 inserted therebetween.

[0175] When the shaft 220 moves to the front side, the front side surface of the fourth E-ring 2205d pushes the rear side surface of the second end plate 261. By this, the front side movement of the shaft 220 is stopped.

[0176] When the shaft 220 moves to the rear side, the back side surface of the third E-ring 2205d pushes the front side surface of the second end plate 261. By this, the rear side movement of the shaft 220 is stopped.

[0177] That is, the third E-ring 2205c and the fourth E-ring 2205d limit the reciprocating distance of the shaft 220.

[0178] The fifth E-ring 2205e and the sixth E-ring 2205f are positioned on the front and rear sides of the shaft receiving portion 270, respectively. By this, the shaft receiving section 270 is secured in the longitudinal direction.

[0179] FIG. 6 is a perspective view illustrating the first end cap illustrated in FIG. four.

[0180] Referring to FIG. 6, the shaft guide portion 255 protrudes from the first end cap 250.

[0181] The shaft direction portion 255 may be defined in a cylindrical shape. However, one side of the shaft guide portion 255 is open to accommodate the outermost portion of the front side of the shaft 220, and the central portion thereof extends through in the radial direction to accommodate the first tenon 2202a.

[0182] The outermost section of the front side of the shaft 220, to which the first pin 2202a is attached, is slidably attached to the section 255 for guiding the shaft. That is, the shaft direction portion 255 guides the reciprocating movement of the shaft 220. In addition, when the first end cap 250 rotates, the shaft direction portion 255 and the front end portion of the shaft 220 engage with each other to rotate together.

[0183] FIG. 7 is a perspective view illustrating the body member illustrated in FIG. four.

[0184] Referring to FIG. 7, the body member 210 is defined in a cylindrical shape with both sides open. In addition, a recessed groove 211 recessed in the longitudinal direction to accommodate the brush portion 230 is provided on the outer circumferential surface. The recessed slot 211 may be placed plural in the circumferential direction.

[0185] The hole 213 for the direction of rotation is placed in the recessed groove 211, passing through. The driven portion 2323 of the brush portion 230 is inserted into the body member 210 through the rotation direction opening 213 . In addition, the rotation direction hole 213 provides a space in which the driven portion 2323 is allowed to rotate.

[0186] Holes 213 for the direction of rotation can be placed in the plural in the longitudinal direction. In other words, when the driven portion 2323 is pluralized in the longitudinal direction, the rotation direction hole 213 can be placed with the same number as the number of driven portions 2323.

[0187] In addition, the end cap attachment hole 215 is provided on the outer peripheral surface of the body member 210. When the end portions of the first connecting protrusion 254 and the second connecting protrusion 264 are caught in the end cap attachment hole 215, the first end cap 250 and the second end cap 260 are attached to the body element 210.

[0188] FIG. 8 is a perspective view illustrating the brush portion illustrated in FIG. four.

[0189] The brush section 230 includes a brush 231 and a brush holder 232.

[0190] The brush 231 is formed from brushes or rubber plate material. The brush 231 strikes the surface to be cleaned in order to capture or raise dust or foreign matter.

[0191] The brush holder 232 is provided in a recessed slot 211 of the body member 210 in the longitudinal direction. Rotating protrusions 2322 protrude from both end portions thereof, respectively, in the longitudinal direction. Each of the rotatable protrusions 2322 is rotatably coupled to a first rotatable lip receiving hole 251a of the first end cap 250 and a second rotatable protrusion receiving hole 261a of the second end cap 260.

[0192] That is, the brush holder 232 rotates about an axis passing through the rotating projection 2322 in the recessed slot 211.

[0193] The brush attachment portion 2321 in which the brush 231 is inserted is placed on one side of the brush holder 232. In addition, the driven section 2323 is placed on the other side opposite the first side.

[0194] The driven portion 2323 is pulled into the housing through a rotation direction hole 213 passing through a recessed slot 211.

[0195] The brush section 230 rotates about one side on which the rotating protrusion 2322 is located. That is, the brush 231 and the driven section 2323 rotate about the same side of the brush section 230.

[0196] FIG. 9 is a perspective view illustrating the shaft receiving portion illustrated in FIG. four.

[0197] In the shaft receiving portion 270, the bearing receiving portion 270b and the shaft attachment hole 270a are sequentially arranged from the front side to the rear side. The shaft attachment hole 270a is a through hole into which the shaft 220 can be inserted. The rear end portion of the shaft 220 is rotatably inserted into the shaft attachment hole 270a, passing through the bearing receiving portion 270b. In the attached state, the bearing is inserted between the outer circumferential surface of the shaft 220 and the bearing receiving portion 270b. By this, the shaft 220 can be rotated separately from the shaft receiving portion 270.

[0198] FIG. 10A is a perspective view illustrating the state before the brush portion of the agitator illustrated in FIG. 3 expands, and FIG. 10B is a perspective view illustrating a state in which the brush portion of the agitator illustrated in FIG. 3 is expanding.

[0199] For convenience of description, part of the body element 210, the first end cap 250 and the second end cap 260 are indicated by dotted lines. In addition, the E-ring 2205 is omitted.

[0200] During the cleaning process, the agitator 200 rotates. As the agitator 200 rotates, one end portion of the brush 231 of the agitator 200 also rotates. When one end portion of the brush 231 strikes the surface to be cleaned, dust or foreign matter present on the surface to be cleaned is driven or captured by the brush 231.

[0201] Here, the radius of rotation of the brush 231 is the distance between the shaft 220 and the outermost portion of the brush 231 at the farthest position from the shaft 220.

[0202] Since the carpet is formed with pile on the surface, the vacuum cleaner 100 is spaced from the surface of the carpet. Accordingly, in the case where the surface to be cleaned is the carpet environment, when the rotation radius of the brush 231 is fixed, there may be a problem that the brush 231 does not reach the carpet surface.

[0203] An aspect of the present disclosure is to provide a stirrer 200 having a structure adapted to expand the radius of rotation of the brush 231 when the surface to be cleaned is the carpet environment. As the radius of rotation of the brush 231 expands in the environment of the carpet, the brush 231 can reach the surface of the carpet.

[0204] The agitator 200 according to an embodiment of the present disclosure can expand the radius of rotation of the brush 231 by rotating the brush portion 230 about one side thereof.

[0205] Hereinafter, an operation process in which the rotation radius of the brush 231 is expanded will be described.

[0206] The shaft 220 is housed in the housing member 210. The front end portion of the shaft 220 is slidably attached to the shaft guide portion 255 of the first end cap 250. In addition, the rear end portion of the shaft 220 is rotatably attached to the receiving opening 261b. shaft of the second end cover 250.

[0207] That is, the shaft 220 is supported by the shaft guiding portion 255 and the shaft receiving hole 261b, and moves longitudinally in the shaft guiding portion 255 and the shaft receiving hole 261b.

[0208] The drive portion 223 protrudes from the outer circumferential surface of the shaft 220. When the shaft 220 reciprocates, the drive portion 223 moves together.

[0209] A groove 2233 for the direction of rotation extending at a predetermined angle with respect to the longitudinal direction of the shaft 220 is located on the radially outer side of the drive portion 223.

[0210] The brush portion 230 rotates about an axis passing through the rotating protrusion 2322. The axis passing through the rotating protrusion 2322 is called the axis of rotation. At this time, the brush 231 extends to one side of the rotation axis, and the driven section 2323 extends to the other side of it. That is, the brush 231 and the driven portion 2323 rotate about the rotation axis.

[0211] The rotation direction slot 2233 directs the brush portion 230 to rotate. The end portion of the driven portion 2323 is inserted into the groove 2233b for the direction of rotation. When the rotation direction slot 2233b moves in the longitudinal direction along with the shaft 220, the end portion of the driven portion 2323 is guided inside the rotation direction slot 2233b.

[0212] The movement of the driven portion 2323 in the slot 2233b for the direction of rotation is as follows.

[0213] Since the driven portion 2323 is attached to the body member 210, and the driven portion 2323 is fixed without moving in the longitudinal direction. However, the driven portion 2323 can rotate through a predetermined angle about an axis passing through the rotating protrusion 2322.

[0214] The range of rotation of the rotating protrusion 2322 is determined by the slope of the slot 2233b for the direction of rotation.

[0215] Since the rotation direction slot 2233b extends through a predetermined angle with respect to the longitudinal direction, both end portions of the rotation direction slot 2233b are spaced from each other in a direction crossing the longitudinal direction. When it is called the separation distance of the groove 2233b for the direction of rotation, the distance of movement of the outer portion of the driven section 2323 in the rotation range of the driven section 2323 is determined from the separation distance.

[0216] When the driving portion 223 reciprocates in the longitudinal direction, the end portion of the driven portion 2323 in the rotation direction slot 2233b reciprocates in a direction crossing the longitudinal direction. By this, the brush section 230 is rotated. The distance between the shaft 220 and the outermost portion of the radially outer side of the brush 231 is changed by rotating the brush portion 230. That is, the rotation radius of the brush 231 is changed.

[0217] Referring again to FIG. 10A, a state in which the shaft 220 moves to the front side as much as possible is illustrated. The end portion of the front side of the shaft 220 is placed adjacent to the rear surface of the first end cap 250. At this point, the end portion of the driven portion 2323 is placed on the rear side of the groove 2233 for the direction of rotation. This state is called the first state.

[0218] Referring again to FIG. 10B, a state in which the shaft 220 moves to the rear side as much as possible in the first state is illustrated. This state is called the second state. In the second state, the front side end portion of the shaft 220 moves away from the rear surface of the first end cap 250. At this time, the driven end end portion 2323 moves to the front side of the rotation direction slot 2233.

[0219] The front side and the rear side of the groove 2233 for the direction of rotation are spaced from each other in the direction crossing the longitudinal direction. That is, the end portion of the driven portion 2323 moves in a direction crossing the longitudinal direction. When the end portion of the driven portion 2323 is moved, the driven portion 2323 rotates about an axis passing through the rotating boss 2322. By this, the brush 231 also rotates about an axis passing through the rotating boss 2322.

[0220] In other words, the brush 231 is rotated by the reciprocating movement of the drive section 223.

[0221] Hereinafter, the process of changing the rotation radius of the brush 231 will be described with reference to FIG. 10C.

[0222] FIG. 10C is a side view illustrating the operation state of the agitator brush portion illustrated in FIG. 3.

[0223] For convenience of description, some of the components are indicated by dotted lines.

[0224] (a) in FIG. 10C illustrates the rotation radius of the brush 231 in the first state, and (b) in FIG. 10C illustrates the rotation radius of the brush 231 in the second state.

[0225] In the first state, the end portion of the driven portion 2323 is placed on the rear side of the groove 2233 for the direction of rotation. At this time, the brush 231 forms an angle A with respect to an imaginary line passing through the central axis of the shaft 220 and the rotation axis of the brush portion 230.

[0226] The central axis of the shaft 220 and the extreme portion of the radially outer side of the brush 231 are spaced apart by the first radius R1 of rotation. In addition, the distance between the central axis of the shaft 220 and the rotation axis of the brush section 230 is spaced apart by L1, and the distance between the rotation axis of the brush section 230 and the outermost portion of the radially outer side of the brush 231 is spaced by L2.

[0227] Here, the first rotation radius R1 can be obtained from the following equation.

[0228]

[0229] Here, cos(A) is less than 1.

[0230] When the agitator 200 changes from the first state to the second state, the end portion of the driven shaft 2323 moves to the front side of the rotation direction slot 2233. By moving the end portion of the driven portion 2323, the brush portion 230 is rotated. At this time, the brush portion 231 is placed parallel to an imaginary line passing through the central axis of the shaft 220 and the rotation axis of the brush portion 230. plot 230.

[0231] In the second state, the central axis of the shaft 220 and the outermost portion of the radially outer side of the brush 231 are spaced apart by a second radius R2 of rotation. Here, the second radius R2 of rotation is L1+L2.

[0232] Here, the values of the first rotation radius R1 and the second rotation radius R2 have the following relationship.

[0233]

[0234] That is, the second rotation radius R2 is formed larger than the first rotation radius R1.

[0235] In the environment of the carpet, the agitator 200 changes from the first state to the second state. Through this, the rotation radius of the brush 231 is expanded from the first rotation radius R1 to the second rotation radius R2. As the radius of rotation expands, the brush 231 can even reach dust or foreign matter on the surface of the carpet. In other words, the rotation radius of the brush 231 can be widened even when the surface to be cleaned changes, thereby preventing the deterioration of the cleaning performance.

[0236] FIG. 11 is a side view illustrating a modified example of the agitator illustrated in FIG. 3.

[0237] (a) in FIG. 11 illustrates the first state before the brush 331 expands. (b) in FIG. 11 illustrates the second state after the brush 331 expands.

[0238] FIG. 11, the fixed brush portion 380 protrudes from the outer peripheral surface of the body member 310. Another configuration that has not been described in FIG. 11 may be understood with reference to an embodiment of the present disclosure.

[0239] In the first state, the end portion of the driven portion 3323 is placed on the rear side of the groove 3233 for the direction of rotation. At this time, the brush 331 forms an angle A with respect to an imaginary line passing through the central axis of the shaft 320 and the rotation axis of the brush portion 330.

[0240] The central axis of the shaft 320 and the extreme portion of the radially outer side of the brush 331 are spaced apart by the first radius R1 of rotation. In addition, the distance between the central axis of the shaft 320 and the rotation axis of the brush section 330 is spaced apart by L1, and the distance between the rotation axis of the brush section 330 and the outermost portion of the radially outer side of the brush 331 is spaced by L2.

[0241] Here, the first rotation radius R1 can be obtained from the following equation.

[0242]

[0243] Here, cos(A) is less than 1.

[0244] When the agitator 300 changes from the first state to the second state, the end portion of the driven portion 3323 moves to the front side of the rotation direction slot 3233. By moving the end portion of the driven portion 3323, the brush portion 330 is rotated. At this time, the brush 331 is placed parallel to an imaginary line passing through the central axis of the shaft 320 and the rotation axis of the brush section 230. That is, the brush 331 forms an angle of 0 with respect to an imaginary line passing through the central axis of the shaft 320 and the rotation axis of the brush section. 330.

[0245] In the second state, the central axis of the shaft 220 and the outermost portion of the radially outer side of the brush 331 are spaced apart by a second radius R2 of rotation. Here, the second radius R2 of rotation can be expressed as L1+L2 * cos(0). Here, the second radius R2 of rotation is L1+L2.

[0246] Here, the values of the first rotation radius R1 and the second rotation radius R2 have the following relationship.

[0247]

[0248] That is, the second rotation radius R2 is formed larger than the first rotation radius R1.

[0249] The fixed brush portion 380 protrudes from the outer peripheral surface of the body member 310 in the longitudinal direction. The fixed brush section 380 can be integrated into or combined with the housing element 310. The distance between the outermost section of the radially outer side of the fixed brush section 380 and the central axis of the shaft 320 is spaced apart by a third radius R3 of rotation.

[0250] At this time, the third rotation radius R3 is larger than the first rotation radius R1 and smaller than the second rotation radius R2. In addition, the fixed brush portion 380 may be placed parallel to the normal line of the outer peripheral surface of the body member 310 on which the fixed brush portion 380 is provided.

[0251] In the first state, the third rotation radius R3 is larger than the first rotation radius R1. Accordingly, the surface to be cleaned is cleaned by the fixed brush portion 380.

[0252] When the surface to be cleaned changes from hard floor to carpet, the agitator 300 changes from the first state to the second state. At this time, the rotation radius of the brush 331 expands from the first rotation radius R1 to the second rotation radius R2. The second rotation radius R2 is larger than the third rotation radius R3, which is the rotation radius of the fixed brush portion 380. That is, the rotation radius is widened.

[0253] Through this, the brush 331 can even reach dust or foreign matter on the surface of the carpet. That is, the rotation radius of the brush 331 can be widened even when the surface to be cleaned changes, thereby preventing the decrease in the cleaning performance.

[0254] In other words, the surface to be cleaned is cleaned by the fixed brush portion 380 in the first state, and the surface to be cleaned is cleaned by the extended brush 331 in the second state.

[0255] When cleaning is performed only by the brush 331 without providing the fixed brush portion 380, the following problem may occur.

[0256] When the fixed brush portion 380 is not provided, the surface to be cleaned is cleaned by the brush 331 that is not extended to the first state. At this time, the brush 331 is tilted in a clockwise direction with respect to the rotation direction of the brush portion 330.

[0257] Here, when the agitator 300 is rotated in the clockwise direction, the pressure with which the brush 331 presses against the surface to be cleaned may be excessively generated. This can adversely affect the durability of the brush 331.

[0258] Conversely, when the agitator 300 is rotated in the counterclockwise direction, the pressure with which the brush 331 presses against the surface to be cleaned may not be sufficient. The difference in cleaning performance may be caused in the first state and the second state.

[0259] In the modified example illustrated in FIG. 11, in the first state, the fixed brush portion 380 is parallel to the normal line of the outer peripheral surface on which the fixed brush portion 380 is provided. rotation of the brush section 330.

[0260] Through this, when the brush portion 380 or the brush 331 applies pressure to the surface to be cleaned, the brush portion 380 or the brush 331 can be perpendicular to the surface to be cleaned.

[0261] That is, an appropriate pressing pressure can be applied to the surface to be cleaned in the first state and the second state without generating overpressure for the brush 331.

[0262] FIG. 12 is a side view illustrating another modified example of the agitator illustrated in FIG. 3.

[0263] (a) in FIG. 12 illustrates the first state before the brush 431 expands. (b) in FIG. 12 illustrates the second state after the brush 431 expands.

[0264] FIG. 12, the brush portion 430 is illustrated in a modified form. A modified configuration that has not been described in FIG. 12 may be understood with reference to an embodiment of the present disclosure.

[0265] Referring to FIG. 12, a modified brush portion 430 is illustrated. The brush portion 430 may include a first brush 431a and a second brush 431b extending at a predetermined angle to each other.

[0266] The first brush attachment portion 2321a that accommodates the first brush 431a and the second brush attachment portion 2321b that accommodates the second brush 431b are located in the brush holder 432. The driven portion 4323 extends from the bottom surface of the brush holder 432.

[0267] The first brush 431a and the second brush 431b may be arranged to have different lengths. The first brush 431a is arranged to be shorter than the second brush 431b.

[0268] The distance between the axis of rotation of the brush portion 430 and the extreme portion of the radially outer side of the first brush 431a is called L2, and the distance between the axis of rotation of the brush portion 430 and the outermost portion of the radially outer side of the second brush 431b is called L3. In addition, the length between the central axis of the shaft 420 and the rotation axis of the brush portion 430 is called L1.

[0269] In the first state, the end portion of the driven portion 4323 is placed on the rear side of the rotation direction slot 4233.

[0270] At this time, the first brush 431a is placed parallel to an imaginary line passing through the central axis of the shaft 420 and the rotation axis of the brush portion 430. That is, the first brush 431a forms an angle of 0 with respect to an imaginary line passing through the central axis of the shaft 420 and an axis of rotation of the brush section 430.

[0271] The central axis of the shaft 420 and the outermost portion of the radially outer side of the first brush 431a are spaced apart by the first radius R1 of rotation. Here, the first radius R1 of rotation is L1+L2.

[0272] That is, the first radius R1 of rotation is equal to the length L1+L2, which is greater than the distance from the central axis of the shaft 420 to the outermost portion of the radially outer side of the second brush 431b.

[0273] That is, in the first state, the floor to be cleaned is cleaned with the first brush 431a.

[0274] When the agitator 400 changes from the first state to the second state, the end portion of the driven portion 4323 moves to the front side of the rotation direction slot 4233. By moving the end portion of the driven portion 4323, the brush portion 430 is rotated.

[0275] At this time, the second brush 431b is placed parallel to an imaginary line passing through the central axis of the shaft 420 and the rotation axis of the brush portion 430. That is, the second brush 431b forms an angle of 0 with respect to an imaginary line passing through the central axis of the shaft 420 and an axis of rotation of the brush section 430.

[0276] In the second state, the central axis of the shaft 420 and the outermost portion of the radially outer side of the second brush 431b are spaced apart by a second radius R2 of rotation. Here, the second radius R2 of rotation is L1+L3.

[0277] That is, the first radius R1 of rotation is equal to the length L1+L3, which is greater than the distance from the central axis of the shaft 420 to the outermost portion of the radially outer side of the second brush 431a.

[0278] That is, in the first state, the floor to be cleaned is cleaned with the second brush 431b.

[0279] In addition, since the length L3 of the second brush 431b is longer than the length L2 of the first brush 431a, the second rotation radius R2 is larger than the first rotation radius R1.

[0280] In other words, when the stirrer 400 changes from the first state to the second state, the rotation radius of the brush portion 430 for cleaning the surface to be cleaned expands from the first rotation radius R1 to the second rotation radius R2.

[0281] When the surface to be cleaned changes from hard floor to carpet, the agitator 400 changes from the first state to the second state. At this time, the rotation radius of the brush portion 430 expands from the first rotation radius R1 to the second rotation radius R2.

[0282] Through this, the second brush 431b can reach even dust or foreign matter on the surface of the carpet. That is, the rotation radius of the brush portion 430 can be widened even when the surface to be cleaned changes, thereby preventing deterioration of the cleaning performance.

[0283] In other words, the surface to be cleaned is cleaned by the first brush 431a in the first state, and the surface to be cleaned is cleaned by the second brush 431b in the second state.

[0284] In the modified example illustrated in FIG. 12, the first brush 431a in the first state and the second brush 431b in the second state are parallel to an imaginary line passing through the central axis of the shaft 420 and the rotation axis of the brush portion 430.

[0285] Through this, when the first brush 431a or the second brush 431b applies pressure to the surface to be cleaned, the first brush 431a or the second brush 431b can be perpendicular to the surface to be cleaned.

[0286] That is, an appropriate pressing pressure can be applied to the surface to be cleaned in the first state and the second state without generating overpressure for the brush 331.

[0287] FIG. 13A is a partial perspective view illustrating another modified example of the agitator illustrated in FIG. 3 and fig. 13B is a partial perspective view illustrating a state in which the agitator brush in FIG. 13A is extended.

[0288] That is, FIG. 13A illustrates the first state before the brush 531 is pulled out. Fig. 13B illustrates the second state after the brush 531 is pulled out.

[0289] FIG. 13A, the driving portion 523 and the driving portion 5323 for rotating the brush portion 530 are illustrated in a modified form. Fig. 13 is a partial perspective view of the rear side of the agitator 500, and another unmodified configuration can be understood with reference to an embodiment of the present disclosure.

[0290] Referring to FIG. 13A, the drive portion 523 protrudes radially from the shaft 520. The drive portion 523 may be arranged in a frustoconical shape.

[0291] The inclined outer peripheral surface 523a of the driving portion 523 is inclined radially outward in the longitudinal direction.

[0292] The driven portion 5323 extending from the brush holder 532 into the body member 511 includes an inclined portion 5323a. The sloped portion 5323a is brought into contact with the outer circumferential surface 523a of the driving portion 523.

[0293] When the first state transitions to the second state, the shaft 520 moves from the rear side to the front side. In this case, the driving portion 523 protruding from the outer circumferential surface of the shaft 520 also moves from the front side to the rear side.

[0294] When the driving portion 523 is moved from the rear side to the front side, the inclined outer peripheral surface 523a of the driving portion 523 pushes the inclined portion 5323a of the driven portion 5323. The inclined portion 5323a rises along the inclined outer peripheral surface 523a, and the driven portion 5323 rotates about the axis, passing through the rotating ledge 5322.

[0295] That is, the inclined outer peripheral surface 523a pushes the inclined portion 5323a to drive the driven portion 5323 into rotation.

[0296] As the driven portion 5323 rotates, the brush 531 also rotates about an axis passing through the rotating protrusion 5322.

[0297] In other words, the brush 531 is rotated by the reciprocating movement of the driving portion 523.

[0298] Hereinafter, the process of changing the rotation radius of the brush 531 will be described with reference to FIG. 13C.

[0299] FIG. 13C is a side view illustrating the operating state of the agitator brush portion illustrated in FIG. 13A and 13B.

[0300] (a) in FIG. 13C illustrates the rotation radius of the brush 531 in the first state, and (b) in FIG. 13C illustrates the rotation radius of the brush 531 in the second state.

[0301] In the first state, the inclined portion 5323a of the driven portion 5323 is brought into contact with the inclined outer peripheral surface 523a of the driven portion 523. At this time, the brush 531 forms an angle A with respect to an imaginary line passing the central axis of the shaft 520 and the rotation axis of the brush portion 530.

[0302] The central axis of the shaft 520 and the extreme portion of the radially outer side of the brush 531 are spaced apart by the first radius R1 of rotation. In addition, the distance between the central axis of the shaft 520 and the rotation axis of the brush section 530 is spaced apart by L1, and the distance between the rotation axis of the brush section 530 and the outermost portion of the radially outer side of the brush 531 is spaced by L2.

[0303] Here, the first rotation radius R1 can be obtained from the following equation.

[0304]

[0305] Here, cos(A) is less than 1.

[0306] When the stirrer 500 changes from the first state to the second state, the inclined portion 5323a of the driven portion 5323 rises along the inclined outer peripheral surface 523a. When the inclined portion 5322a rises along the inclined outer peripheral surface 523a, the driven portion 5323 rotates about an axis passing through the rotating protrusion 5322. That is, the brush portion 530 rotates.

[0307] At this time, the brush 531 is placed parallel to an imaginary line passing through the central axis of the shaft 520 and the rotation axis of the brush portion 530. That is, the brush 531 forms an angle of 0 with respect to an imaginary line passing through the central axis of the shaft 520 and rotation of the brush section 530.

[0308] In the second state, the central axis of the shaft 520 and the outermost portion of the radially outer side of the brush 531 are spaced apart by a second radius R2 of rotation. Here, the second radius R2 of rotation is L1+L2.

[0309] That is, the values of the first rotation radius R1 and the second rotation radius R2 have the following relationship.

[0310]

[0311] That is, the second rotation radius R2 is formed larger than the first rotation radius R1.

[0312] In the environment of the carpet, the agitator 500 changes from the first state to the second state. Through this, the rotation radius of the brush 531 is expanded from the first rotation radius R1 to the second rotation radius R2. As the radius of rotation expands, the brush 531 can even reach dust or foreign matter on the surface of the carpet. In other words, the rotation radius of the brush 531 can be widened even when the surface to be cleaned changes, thereby preventing the deterioration of the cleaning performance.

[0313] Hereinafter, a cleaning unit including components for controlling the stirrer of the present disclosure and a method for controlling the same will be described in detail with reference to FIG. 14-16.

[0314] In the following description, the description of some components will be omitted in order to clarify the distinguishing features of the present disclosure.

[0315] FIG. 14 is a block diagram illustrating a configuration for controlling a cleaning unit according to the present disclosure.

[0316] Referring to FIG. 14, a cleaning unit having components for controlling the agitator of the present disclosure includes a body assembly 10, a sensor 20, a controller 30, and a database 40.

[0317] First, the body assembly 10 will be described.

[0318] The body assembly 10 defines the body of the cleaning block of the present disclosure.

[0319] For example, the body cover 10 may be the vacuum cleaner body 110 of FIG. 1 illustrated to describe the prior art robot cleaner.

[0320] A predetermined space is formed in the body assembly 10 . Sensor 20, controller 30 and database 40 may be provided in space.

[0321] Also, the housing assembly 10 includes a driving (or driving) module 11 and a power module 13.

[0322] The drive module 11 can be driven by the power module 13. That is, the driving force generated by the power module 13 can be transmitted to the drive module 11.

[0323] In some implementations, the drive module 11 may include a rotary module 11a and a control module 11b. The agitator 200, 300, 400, 500 according to the present disclosure can be used for the rotary module 11a, and the shaft receiving portion 270 according to the present disclosure can be used for the control module 11b.

[0324] The power module 13 may include a first power module 13a and a second power module 13b. The first power unit 13a, as a unit that generates rotation force, is connected to the rotation unit 11a to rotate the rotation unit 11a. The second power module 13b, as a module that pushes and pulls the control module 11b in a particular direction, may be connected to the control module 11b to drive the control module 11b.

[0325] In some implementations, a servomotor that generates a rotational force may be used for the first force module 13a, and a linear servo that applies pressure in a particular direction may be used for the second force module 13b. However, other known power devices adapted to generate rotational force and apply pressure in a particular direction may be used in addition to the servomotor and linear servomotor.

[0326] The agitator 200, 300, 400, 500 attached thereto can be rotated by the first power module 13a. In addition, the shaft receiving portion 270, 370 can be pushed or pulled by the second force module 13b during rotation.

[0327] Through this, when the shaft 220, 320, 420 and 520 moves towards the front side, the rotation radius of the brush portion 230, 330, 430, 530 can be reduced.

[0328] In addition, when the shaft 220, 320, 420, 520 moves towards the rear side, the rotation radius of the brush portion 230, 330, 430, 530 can be expanded.

[0329] In an embodiment of the present disclosure, power module 13 may receive power from outside. The power module 13 may be supplied with power by a battery (not shown) provided in the cleaner body 110 . The power module 13 may be electrically connected to a battery (not shown).

[0330] The first power module 13a and the second power module 13b can be independently driven. That is, the rotation of the first power unit 13a and the second power unit 13b, the number of rotations, and the like. can be adjusted independently of each other. To this end, the first power module 13a and the second power module 13b may each be electrically connected to the controller 30.

[0331] Hereinafter, the sensor 20 will be described.

[0332] The sensor 20 can detect the value of the current generated when the rotary module 11a is rotated by the first power module 13a. That is, the first power module 13a can detect the value of the current generated by rotating the agitator 200, 300, 400, 500.

[0333] The information recognized or detected by the sensor 20 is transmitted to the controller 30, allowing the controller 30 to generate control information appropriate for the given condition or situation.

[0334] The sensor 20 may be provided in a form adapted to recognize the current value of the first power module 13a.

[0335] The sensor 20 may be electrically connected to a battery (not shown). The power required to operate the sensor 20 may be supplied from a battery (not shown).

[0336] The sensor 20 includes a current value sensor module 21 adapted to detect a current value. In some implementations, the current value sensor module 21 may measure the current value using an ammeter that is electrically connected to the circuit, or by measuring the magnetic field.

[0337] When the current value sensor unit 21 recognizes the current value of the first power unit 13a, the state of the floor on which the vacuum cleaner is currently operating can be recognized.

[0338] When the vacuum cleaner is in the carpet environment and not in the hard floor environment, the wheels of the vacuum cleaner sink a predetermined length from the top of the carpet environment, and thus the first power module 13a drives the agitator 200, 300, 400 , 500. The current value used for rotation is increased.

[0339] The controller 30 can generate appropriate or correct operation information by comparing the current value detected by the current value sensor unit 21 with a predetermined current value to determine that the vacuum cleaner is on the carpet.

[0340] The current value sensor module 21 may be connected to the first power module 13a to measure the current value of the first power module 13a.

[0341] Hereinafter, the controller 30 will be described.

[0342] The controller 30 receives the current value from the sensor 20 and calculates the operating information for operating the second power module 13b.

[0343] In addition, the controller 30 is electrically connected to the sensor 20 to receive the current value detected by the sensor 20.

[0344] The controller 30 may calculate the operational information using the received recognized information. Additionally, the controller 30 may control the second power module 13b based on the calculated operating information. To do this, the controller 30 is electrically connected to the second power module 13b.

[0345] The controller 30 is electrically connected to the database 40. The information detected by the sensor 20 and the information calculated by the controller 30 may be stored in the database 40.

[0346] Various modules of the controller 30, described later in this document, are electrically connected to each other, so that information entered into one module, or information calculated by one module, can be transmitted to another module.

[0347] The controller 30 may be provided in a form adapted for input, output, and calculation of information. In some implementations, controller 30 may be provided in the form of a microprocessor, a central processing unit (CPU), a printed circuit board (PCB), or the like.

[0348] The controller 30 is located in a predetermined space formed in the body 110 of the vacuum cleaner. The controller 30 may be housed in a hermetically sealed manner so as not to be exposed to outside moisture or the like.

[0349] The controller 30 includes a recognition information receiving unit 32, an operation information calculation unit 33, and an operation control unit 31.

[0350] The operating information calculation unit 33 calculates operating information for operating the second power unit 13b.

[0351] The operation information calculation unit 33 may calculate operation information using the current value of the first power unit 13a transmitted to the recognition information receiving unit 32. The operation control module 31 is electrically connected to the operation information calculation module 33 .

[0352] Operational information can be obtained by the operation control unit 31 . The operation control unit 31 is configured to control the second power unit 13b according to the calculated operating information.

[0353] Specifically, the operating information refers to information in which the second power unit 13b pushes or pulls the shaft receiving portion 270. When the shaft receiving portion 270 is pushed or pulled by the second force module 13b, the agitator 200, 300, 400, 500 may decrease or expand the rotation radius of the brush portion 230, 330, 430, 530 during rotation.

[0354] Next in this document, the database 40 will be described.

[0355] The database 40 stores information relating to the operation of the vacuum cleaner.

[0356] The database 40 may be provided in a form adapted for input, output, and storage of information. In some implementations, the database 40 may be provided in the form of an SD card, micro SD card, USB memory, SSD, or the like.

[0357] The database 40 is electrically connected to the operating information calculation module 33 . The operation information calculated by the operation information calculation unit 33 may be transferred to the database 40 for storage.

[0358] The database 40 is electrically connected to the sensor 20 via the recognition information receiving unit 32 . The current value detected by the sensor 20 may be transferred to the database 40 for storage.

[0359] The database 40 includes a recognition information storage unit 41 and an operation information storage unit 42 . Modules 41 and 42 may be electrically connected to each other.

[0360] The operation information storage unit 42 stores the operation information calculated by the operation information calculation unit 33 . The operation information storage unit 42 is electrically connected to the operation information calculation unit 33 .

[0361] The recognition information storage unit 41 can store the recognition information according to specific operating information. The recognition information storage unit 41 is electrically connected to the operation information storage unit 42 .

[0362] The recognition process by the sensor 20, the information processing and the calculation process by the controller 30, and the information storage process in the database 40 can be performed in real time.

[0363] Hereinafter, the method for adjusting the extension length of the cleaning block brush assembly according to the present disclosure will be described in detail with reference to FIG. 15-16.

[0364] FIG. 15 is a flowchart illustrating the flow of the cleaning block control method according to the present disclosure.

[0365] When the cleaner is running on the floor, the sensor 20 detects the current value of the first power unit 13a (S10).

[0366] The first power module 13a is connected to the agitator 200, 300, 400, 500 of the vacuum cleaner to rotate the agitator 200, 300, 400, 500. The agitator 200, 300, 400, 500 is connected to the suction nozzle module 120 and exposed to the floor environment. to rotate as the suction nozzle module 120 slides in the floor environment.

[0367] When the suction nozzle module 120 is moved by the wheel module 160 from the floor at a predetermined distance. When the vacuum cleaner moves on a hard floor surface, the agitator 200, 300, 400, 500 provided in the suction nozzle module 120 rotates at a specific distance from the floor.

[0368] When the vacuum cleaner is moved from a hard floor surface to a carpet, the wheel module 160 retracts to a predetermined depth of the carpet, allowing the agitator 200, 300, 400, 500 to be positioned closer to the carpet compared to the hard floor surface.

[0369] Accordingly, the brush portion 230, 330, 430, 530 of the agitator 200, 300, 400, 500 receives more resistance compared to the hard floor surface, causing more current to flow in the first power module 13a that rotates the agitator 200, 300, 400, 500.

[0370] The value of the current flowing through the first power module 13a can be detected by the current value recognition module 21 included in the sensor 20.

[0371] When the current value recognition unit 21 detects the value of the current flowing through the first power unit 13a, the controller 30 calculates the operation information using the current value of the first power unit 13a (S20).

[0372] The current value of the first power module 13a measured by the current value recognition unit 21 is received by the recognition information receiving unit 32 of the controller 30, and the operation information calculation unit 33 calculates operation information using the current value received by the recognition information receiving unit 32.

[0373] When the operating information calculating unit 33 calculates the operating information, the second power unit 13b is controlled based on the calculated operating information (S30).

[0374] The operation information calculated by the operation information calculation unit 33 is transmitted to the operation control unit 31, and the second power unit 13b is driven by the operation control unit 31 according to the operation information.

[0375] The operation information includes allowing the second power module 13b to push the shaft 270 to receive the shaft to the front side at a predetermined pressure, or allowing the second power module 13b to pull the shaft receiving section 270 to the rear side with a predetermined pressure.

[0376] The operation information calculation process by the operation information calculation unit 33 will be described in detail with reference to FIG. 16.

[0377] FIG. 16 is a flowchart illustrating an embodiment of step S20 in FIG. fifteen.

[0378] The current value of the first power module 13a is input to enable the controller 30 to calculate the operation information using the current value (S201).

[0379] The current value of the first power unit 13a is transmitted to the recognition information receiving unit 32 of the controller 30, and the operation information calculation unit 33 compares it with a predetermined first value (S202).

[0380] When the transmitted current value is less than the predetermined first value, the operation information calculation unit 33 calculates the first operation information (S203).

[0381] The first value is the set value of the current flowing in the first power module 13a when the first power module 13a is driven on the carpet. When the predetermined current value is smaller than the first value, the operating information calculation unit 33 determines that the vacuum cleaner is being used or operated on a hard floor surface and not on a carpet.

[0382] That is, the first operating information includes information that pushes the shaft receiving portion 270 to the front side with a predetermined pressure.

[0383] The first operation information is transmitted to the operation control unit 31, and the operation control unit 31 controls the second power unit 13b to push the shaft receiving portion 270 to the front side with a predetermined pressure.

[0384] When the transferred current value is greater than the predetermined first value, the operation information calculation unit 33 calculates the second operation information (S204).

[0385] The first value is the set value of the current flowing in the first power module 13a when the first power module 13a is driven on the carpet. When the transmitted current value is larger than the first value, the operating information calculation unit 33 determines that the vacuum cleaner is operated on a carpet.

[0386] That is, the second operating information includes information enabling the second power module 13b to pull the shaft receiving portion 270, 370 to the rear with a predetermined pressure so as to expand the rotation radius of the brush portion 230, 330, 430, 530 agitator 200, 300, 400, 500 during rotation.

[0387] That is, the second operation information is transmitted to the operation control unit 31, and the operation control unit 31 controls the second power unit 13b to pull the control unit 11b to the rear with a predetermined pressure.

[0388] As described above, the cleaning unit according to the present disclosure can be used in a device that is automatically operated, such as a robot vacuum cleaner, so as to be automatically controlled so that the length of the brush assembly can be extended according to floor conditions.

[0389] The expansion of the brush portion of the cleaning unit including the agitator 200, 300, 400, 500 according to the present disclosure is not limited to being performed by automatic control.

[0390] The shaft 220, 320, 420, 520 may be configured by a mechanical configuration connected to the shaft receiving portion 270 to be pushed or pulled. For example, the brush portion 230, 330, 430, 530 can be mechanically extended by user manipulation of a button.

[0391] Although the present disclosure is described with reference to preferred embodiments, various modifications and improvements will occur to those skilled in the art without departing from the spirit and scope of the present disclosure, which are defined in the following claims.

Claims (50)

1. Cleaning block of a vacuum cleaner, containing: a columnar body part, in which the hole for the direction of rotation is located on its outer peripheral surface; a shaft provided to reciprocate a predetermined distance in a longitudinal direction in a cavity provided in the body portion; a drive portion protruding from the shaft in the radial direction; a brush portion having one side provided on the outer peripheral surface of the body portion in the longitudinal direction for rotation with one side as its axis of rotation, wherein one side of the brush portion provided on the outer peripheral surface of the body portion includes one end of the brush portion; and a driving portion extending from the brush portion towards the driving portion to be inserted into the rotation direction groove located in the driving region through the rotation direction hole, wherein the groove for the direction of rotation extends at a predetermined angle relative to the longitudinal direction of the shaft, and wherein, when the shaft performs a reciprocating motion, the driven portion is driven into rotation by the rotation direction groove, and the brush portion is rotated by the rotation of the driven portion. 2. The cleaning unit of the vacuum cleaner according to claim 1, further provided with a plurality of brush portions and driven portions extending from the brush portion located in the body portion in the circumferential direction, and a plurality of grooves for the direction of rotation disposed in the driving portion in the circumferential direction. 3. The cleaning unit of the vacuum cleaner according to claim 2, further provided with a plurality of drive portions longitudinally disposed on the shaft, wherein the plurality of actuator portions are disposed along the lengthwise direction of the brush portion. 4. The cleaning unit of the vacuum cleaner according to claim 1, wherein the distance between the shaft and the other end of the brush section becomes minimum when the shaft moves towards one side of the body part as much as possible, and becomes maximum when the shaft moves towards the other side opposite said one side. 5. The cleaning unit of the vacuum cleaner according to claim 1, wherein the cleaning unit further comprises a fixed brush portion extending radially outward from an outer peripheral surface of the body portion, wherein the distance between the shaft and the other end of the brush section is spaced apart by the first radius of rotation, which is the minimum value when the shaft moves to the maximum towards one side of the body part, and spaced by the second radius of rotation, which is the maximum value, when the shaft moves to the maximum along towards the other side opposite said one side, and while the distance between the shaft and the extreme section of the radially outer side of the fixed brush section is greater than the first radius of rotation and less than the second radius of rotation. 6. The cleaning unit of the vacuum cleaner according to claim 1, in which the brush section contains the first brush and the second brush, respectively, extending from one side of the brush section to the radially outer side of the body part, and wherein the first brush and the second brush form a predetermined angle with each other, and the lengths in the extension direction of the first brush and the second brush differ from each other. 7. The cleaning block of the vacuum cleaner according to claim 1, in which the body part contains: a hollow body member disposed with a recessed groove in which a brush portion is provided on its outer circumferential surface, both ends of which are open; and a first end cap and a second end cap, respectively, mounted on both ends of the body member to cover both ends, respectively. 8. The cleaning block of the vacuum cleaner according to claim 7, in which one side of the brush section is placed in a recessed groove, wherein the rotating protrusions are placed at both ends of one side of the brush section in the longitudinal direction, and wherein the first end cap and the second end cap are provided with receiving holes rotatable by the rotating protrusions. 9. The cleaning block of the vacuum cleaner according to claim 7, in which the shaft contains a spike for transmitting power passing through one side of the shaft, and wherein the first end cap comprises a shaft guiding portion slidably attached to one side of the shaft. 10. The cleaning unit of the vacuum cleaner according to claim 9, wherein the shaft guiding hole configured to slide the shaft is provided in the second end cap, and wherein the shaft comprises at least one E-ring protruding in the radial direction, while the second end cover is located between the E-shaped rings to limit the reciprocating distance of the shaft. 11. Cleaning block of the vacuum cleaner according to claim 10, in which the cleaning block further comprises a section for receiving the shaft, mounted on the other side of the shaft, wherein the bearing is inserted between the shaft receiving portion and the shaft, and wherein the shaft receiving portion is placed between the E-rings to secure the shaft receiving portion in the longitudinal direction. 12. The cleaning block of the vacuum cleaner according to claim 11, in which the cleaning block further comprises: a first power module connected to the first end cap to rotate the shaft; a second power module connected to the shaft receiving portion to push and pull the shaft receiving portion according to the operating information; a sensor connected to the first power module and configured to detect a current value of the first power module; and a controller that calculates the operating information, which is electrically connected to the second power module to transmit the calculated operating information to the second power module, and electrically connected to the sensor to receive the current value of the first power module that is detected by the sensor, and wherein the controller calculates operating information using the detected current value of the first power module. 13. The cleaning block of the vacuum cleaner according to claim 12, wherein the operating information comprises first operating information and second operating information, wherein the second power module receives the first operation information to push the predetermined pressure shaft receiving portion, and receives the second operation information to pull the predetermined pressure shaft receiving portion, and wherein the controller calculates the first operation information when the detected current value of the first power module is greater than or equal to the first value, and calculates the second operation information when the detected current value of the first power module is less than the first value. 14. Cleaning block of a vacuum cleaner, containing: a columnar body part, in which the hole for the direction of rotation is located on its outer peripheral surface; a shaft provided to reciprocate a predetermined distance in a longitudinal direction in a cavity provided in said housing; a drive portion protruding from the shaft in the radial direction and having an outer peripheral surface inclined radially outward in the longitudinal direction; a brush portion having one side provided on the outer circumferential surface of the body portion in the longitudinal direction for rotation with one side as its rotation axis; and driven section extending from the brush section into the body part through the opening for the direction of rotation, wherein the driven portion has an inclined portion in contact with the outer peripheral surface, and wherein, when the shaft performs a reciprocating motion, the driven portion is rotated by the outer circumferential surface, and the brush portion is rotated by the rotation of the driven portion. 15. The cleaning unit of the vacuum cleaner according to claim 14, wherein the brush portion and the driven portion extending from the brush portion are arranged in a plurality in the circumferential direction of the body portion. 16. The cleaning block of the vacuum cleaner according to claim 15, in which the driving section is located in a plurality in the longitudinal direction on the shaft, and wherein the leading portion is located in plurality in the longitudinal direction of the brush portion. 17. The cleaning unit of the vacuum cleaner according to claim 14, wherein the distance between the shaft and the other end of the brush section becomes minimum when the shaft moves towards one side of the body part as much as possible, and becomes maximum when the shaft moves towards the other side opposite said one side.

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